Dissipation of disturbances seen in the knee joint kinematics of children with cerebral palsy

Max J Kurz, David J. Arpin, Brenda L. Davies, James E. Gehringer

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Purpose: Children with cerebral palsy (CP) often use a crouch gait pattern that has disturbances in the knee joint kinematics. Although the length and rate of lengthening of the hamstring musculature have been speculated to be the reason that these disturbances are not adequately dissipated, this relationship has not been adequately explored. The purpose of this exploratory investigation was to use simulations of a musculoskeletal model and Floquet analysis to evaluate how the performance of hamstrings musculature during gait may be related to the knee joint instabilities seen in children with CP. Methods: Children with CP and typically developing (TD) children walked on a treadmill as a motion capture system assessed the knee joint kinematics. Floquet analysis was used to quantify the rate that disturbances present at the knee joint were dissipated, and simulations of a musculoskeletal model were used to estimate the in vivo length and velocity of the hamstrings. Pearson correlation coefficients were calculated to determine if there was a relationship between the rate that the disturbances were dissipated and the performance of the hamstring musculature. Results: The children with CP had hamstrings that lengthened more slowly than TD children, and required more strides to dissipate disturbances in the knee joint kinematics. There was negative correlation between the rate that the hamstrings lengthened and the rate that the knee joint disturbances were dissipated. Conclusions: Our results suggest that the ability of children with CP to dissipate the knee joint disturbances may be related to the inability to properly control the hamstring musculature.

Original languageEnglish (US)
Pages (from-to)67-72
Number of pages6
JournalActa of Bioengineering and Biomechanics
Volume17
Issue number4
DOIs
StatePublished - 2015

Fingerprint

Cerebral Palsy
Knee Joint
Biomechanical Phenomena
Kinematics
Exercise equipment
Gait
Joint Instability

Keywords

  • Biomechanics
  • Crouch
  • Gait
  • Musculoskeletal model
  • Variability
  • Walking

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering
  • Biomedical Engineering
  • Biomaterials

Cite this

Dissipation of disturbances seen in the knee joint kinematics of children with cerebral palsy. / Kurz, Max J; Arpin, David J.; Davies, Brenda L.; Gehringer, James E.

In: Acta of Bioengineering and Biomechanics, Vol. 17, No. 4, 2015, p. 67-72.

Research output: Contribution to journalArticle

Kurz, Max J ; Arpin, David J. ; Davies, Brenda L. ; Gehringer, James E. / Dissipation of disturbances seen in the knee joint kinematics of children with cerebral palsy. In: Acta of Bioengineering and Biomechanics. 2015 ; Vol. 17, No. 4. pp. 67-72.
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